EP3739669A1 - Secondary battery and manufacturing method therefor - Google Patents
Secondary battery and manufacturing method therefor Download PDFInfo
- Publication number
- EP3739669A1 EP3739669A1 EP18899745.6A EP18899745A EP3739669A1 EP 3739669 A1 EP3739669 A1 EP 3739669A1 EP 18899745 A EP18899745 A EP 18899745A EP 3739669 A1 EP3739669 A1 EP 3739669A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tabs
- current collection
- coupled
- secondary battery
- collection tab
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title abstract description 8
- 238000003466 welding Methods 0.000 claims description 21
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000002210 silicon-based material Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 description 24
- -1 polyethylene Polymers 0.000 description 9
- 239000007789 gas Substances 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 6
- 239000012212 insulator Substances 0.000 description 6
- 229920000573 polyethylene Polymers 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/134—Electrodes based on metals, Si or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/386—Silicon or alloys based on silicon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/167—Lids or covers characterised by the methods of assembling casings with lids by crimping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- first tabs may be configured to have larger areas as they are positioned further outward in view of the winding center of the electrode assembly.
- the secondary battery 100 may include an electrode assembly 110, a current collection tab 120 coupled to the electrode assembly 110, an insulation plate 130 coupled to each of upper and lower portions of the electrode assembly 110, a case 140 housing the electrode assembly 110, a cap-up 150 clamped with the case 140, a cap-down 180 located under the cap-up 150 so as to correspond thereto, an insulator 170 located under the cap-down 180, a sub-plate 162 for coupling a lower portion of the cap-down 180 to the current collection tab 120, and a gasket 190 located between the cap-up 150 and the case 140 to make the cap-up 150 closely contact the case 140.
- the first electrode plate 111 is formed by coating a first electrode active material, such as a transition metal oxide, on a first electrode current collector made of a metal foil, such as an aluminum foil.
- a first current collection tab 121 is attached to the first electrode plate 111. One end of the first current collection tab 121 is electrically connected to the first electrode plate 111, and the other end thereof protrudes to an upper portion of the electrode assembly 110 to then be electrically connected to the cap assembly 130.
- the separator 113 is disposed between the first electrode plate 111 and the second electrode plate 112 to prevent a short circuit therebetween while allowing lithium ions to move.
- the separator 113 may be made of polyethylene, polypropylene or a composite film of polyethylene and polypropylene.
- the first current collection tab 121 electrically connect the first tabs 111a and the safety vent 160.
- the first current collection tab 121 is coupled to the first tabs 111a at front and rear ends thereof by ultrasonic welding, and thus can put together the plurality of first tabs 111a to then be fixed.
- the second insulation plate 132 may be shaped to correspond to the first insulation plate 131. Therefore, the second insulation plate 132 may be formed to cover a lower region of the electrode assembly 110 and may include a hole (not shown) through which the second tabs 112a protrude to a lower portion of the second insulation plate 132. Accordingly, the second tabs 112a may be coupled to the second current collection tab 122.
- the secondary battery 100 includes the plurality of first tabs 111a and the plurality of second tabs 112a extending from the respective uncoated portions of the first electrode plate 111 and the second electrode plate 112, which constitute the electrode assembly 110, to be integrally formed with the first electrode plate 111 and the second electrode plate 112, thereby increasing electrical efficiency by reducing electrical resistance, and preventing deformation of the electrode assembly from occurring in a case where separate lead tabs are coupled to the first and second electrode plates 111 and 112, and ultimately preventing lowering of roundness.
- first current collection tab 121 and the second current collection tab 122 are coupled to the first tabs 111a and the second tabs 112a, respectively, ultrasonic welding is employed, so that a plurality of protrusions are formed on surfaces of the first current collection tab 121 and the second current collection tab 122 to increase resistance, thereby allowing the first current collection tab 121 and the second current collection tab 122 to be stably coupled to the sub-plate 162 and the case 14-, respectively, by resistance welding.
- the first tabs 111a may be arranged so as to have an equal width. Therefore, when the first tabs 111a are compressed at front and rear ends to overlap each other with the same area, thereby facilitating welding.
- a first insulation plate 131 and a second insulation plate 132 may be coupled to top and bottom portions of the electrode assembly 110, respectively.
- the respective insulation plates 131 and 132 include holes 131a and 132a to allow the first tabs 111a and the second tabs 112a of the electrode assembly 110 to protrude therethrough, thereby maintaining the tabs 111a and 112a to be coupled to the respective current collection tabs 121 and 122.
- FIG. 10 is a perspective view illustrating an electrode assembly in a secondary battery according to another embodiment.
- FIG. 11 is a plan view illustrating the electrode assembly in the secondary battery according to another embodiment.
- the electrode assembly 210 may include first tabs 211a and second tabs 212a protruding to top and bottom portions thereof, respectively.
- the first tabs 211a and the second tabs 212a may be configured to extending from uncoated portions of a first electrode plate and a second electrode plate to be integrally formed therewith, respectively.
- the first tabs 211a and the second tabs 212a may be configured to have larger areas as they are positioned further from the center of the electrode assembly 110. That is to say, each of the first tabs 211a and the second tabs 212a may be provided in the shape of an arc having a corresponding angle on the basis of the center of the electrode assembly 110. With this configuration, the first tabs 211a and the second tabs 212a may make contact with the first current collection tab and the second current collection tab over an increased area to then be coupled to each other, thereby reducing resistance and ultimately increasing electrical efficiency.
- the present disclosure relates to a secondary battery which has a reinforced strength and can achieve high power efficiency.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
- The present disclosure relates to a secondary battery which has a reinforced strength and can achieve high power efficiency.
- In a secondary battery, the internal temperature of the battery rises and gases are generated due to an abnormal use or operation, such as a short-circuit or an overcharge, the internal pressure of the battery may rise.
- When a lithium secondary battery, for example, is overcharged, an electrolyte is decomposed to generate gases such as carbon dioxide or carbon monoxide, so that the internal pressure of the battery may increase. In addition, when an overcurrent flows due to an overcharge or a short circuit, the internal pressure of the battery may rise to convert the electrolyte into gases. Accordingly, the internal pressure and temperature of the battery may rise and there is a danger of fire, causing a serious safety concern. This may generally deteriorate the performance and life characteristics of the battery.
- The present disclosure provides a secondary battery which has a reinforced strength and can achieve high power efficiency.
- According to an aspect of the present disclosure, provided is a secondary battery which includes: an electrode assembly including a first electrode plate and a second electrode plate, wherein one of the first electrode plate and the second electrode plate includes a plurality of first tabs formed to protrude in one direction; a first current collection tab coupled to the first tabs; a case housing the electrode assembly; and a cap assembly coupled to the upper part of the case, wherein the first current collection tab is coupled to one of the cap assembly and the bottom surface of the case.
- Here, the cap assembly may include a safety vent having the first current collection tab connected thereto.
- In addition, the first current collection tab may be electrically connected to a sub-plate coupled to a protrusion part of the safety vent.
- In addition, the electrode assembly may further include a plurality of second tabs formed to extend from the other of the first electrode plate and the second electrode plate and to protrude in the other direction different from the one direction, and a second current collection tab coupled to the second tabs, wherein the second current collection tab is coupled to the other of the cap assembly and the bottom surface of the case, to which the first current collection tab is not coupled.
- Alternatively, the electrode assembly may further include a second tab formed to extend from the other of the first electrode plate and the second electrode plate and to protrude in the other direction different from the one direction, wherein the second tab is coupled to the other of the cap assembly and the bottom surface of the case, to which the first current collection tab is not coupled.
- In addition, the first current collecting tab may be positioned at front and rear end of the first tabs to then be coupled to the first tabs by ultrasonic welding.
- In addition, the first current collection tab may be coupled to the cap assembly or the case by resistance welding.
- In addition, the second electrode plate may be formed of a silicon (Si) based material.
- In addition, the first tabs may be arranged in the electrode assembly so as to overlap one another with the same area.
- In addition, the first tabs may be configured to have larger areas as they are positioned further outward in view of the winding center of the electrode assembly.
- In addition, the first current collection tab may be coupled to the first tabs at front and rear ends of the first tabs and is formed by cutting regions of the first tabs positioned outward in view of end portions of the first tabs.
- As described above, the secondary battery according to the present disclosure includes a plurality of first tabs and a plurality of second tabs extending from uncoated portions of a first electrode plate and a second electrode plate constituting an electrode assembly to be integrally formed therewith, thereby increasing electrical efficiency by reducing electrical resistance and preventing deformation of the electrode assembly from occurring when separate lead tabs are coupled to each other, and ultimately avoiding degradation of roundness.
- In addition, the secondary battery according to the present disclosure includes current collection tabs including a first current collection tab and a second current collection tab coupled to first tabs and second tabs at front and rear ends thereof, respectively, by which separate lead tabs may be replaced, thereby allowing conventional methods for manufacturing cylindrical batteries to be still utilized, thereby increasing the manufacturing efficiency.
- In addition, in the secondary battery according to the present disclosure, when a first current collection tab and a second current collection tab are coupled to first tabs and second tabs, respectively, ultrasonic welding is employed, so that a plurality of protrusions are formed on surfaces of the first and second current collection tabs to increase resistance, thereby allowing the first current collection tab and the second current collection tab to be stably coupled to a sub-plate and a case, respectively, by resistance welding.
- In addition, the secondary battery according to the present disclosure includes first tabs and second tabs each formed in the shape of an arc having a corresponding angle on the basis of the center of the electrode assembly to allow the first tabs and the second tabs to make contact with the first current collection tab and the second current collection tab over an increased area to then be coupled to each other, thereby reducing resistance and increasing electrical efficiency.
-
-
FIG. 1 is a cross-sectional view illustrating a secondary battery according to an embodiment. -
FIG. 2 is an enlarged cross-sectional view illustrating a cap assembly ofFIG. 1 . -
FIG. 3 is a perspective view illustrating an electrode assembly in the secondary battery according to an embodiment. -
FIG. 4 is a side view illustrating the electrode assembly in the secondary battery according to an embodiment. -
FIG. 5 is a plan view illustrating the electrode assembly in the secondary battery according to an embodiment. -
FIG. 6 is a side view illustrating a state in which a current collection tab is coupled to the electrode assembly in the secondary battery according to an embodiment. -
FIG. 7 is a plan view illustrating an insulation plate in the secondary battery according to an embodiment. -
FIG. 8 is a side view illustrating the insulation plate provided at the electrode assembly in the secondary battery according to an embodiment. -
FIG. 9 is a cross-sectional view illustrating a state in which the electrode assembly is inserted into a case in the secondary battery according to an embodiment. -
FIG. 10 is a perspective view illustrating an electrode assembly in a secondary battery according to another embodiment. -
FIG. 11 is a plan view illustrating the electrode assembly in the secondary battery according to another embodiment. -
100, 200, 300, 400: Secondary battery 110, 210: Electrode assembly 111a: First tab 112: Second tab 120: Current collection tab 121: First current collection tab 122: Second current collection tab 130: Insulation plate 131: First insulation plate 132: Second insulation plate 140: Case 150: Cap-up 160: Safety vent 162: Sub-plate 170: Insulator 180: Cap-down 190: Gasket - Hereinafter, examples of embodiments of the invention will be described in detail with reference to the accompanying drawings such that they can readily be made and used by those skilled in the art.
-
FIG. 1 is a cross-sectional view illustrating a secondary battery according to an embodiment.FIG. 2 is an enlarged cross-sectional view illustrating a cap assembly ofFIG. 1 . - Referring to
FIGS. 1 and2 , thesecondary battery 100 according to an embodiment may include anelectrode assembly 110, acurrent collection tab 120 coupled to theelectrode assembly 110, aninsulation plate 130 coupled to each of upper and lower portions of theelectrode assembly 110, acase 140 housing theelectrode assembly 110, a cap-up 150 clamped with thecase 140, a cap-down 180 located under the cap-up 150 so as to correspond thereto, aninsulator 170 located under the cap-down 180, asub-plate 162 for coupling a lower portion of the cap-down 180 to thecurrent collection tab 120, and agasket 190 located between the cap-up 150 and thecase 140 to make the cap-up 150 closely contact thecase 140. - The
electrode assembly 110 includes afirst electrode plate 111, a second electrode plate 112, and aseparator 113 interposed between thefirst electrode plate 111 and the second electrode plate 112. Theelectrode assembly 110 may be formed by winding a stacked structure of thefirst electrode plate 111, theseparator 113 and the second electrode plate 112 in a jelly-roll configuration. Here, thefirst electrode plate 111 may function as a cathode and the second electrode plate 112 may function as an anode. - The
first electrode plate 111 is formed by coating a first electrode active material, such as a transition metal oxide, on a first electrode current collector made of a metal foil, such as an aluminum foil. A firstcurrent collection tab 121 is attached to thefirst electrode plate 111. One end of the firstcurrent collection tab 121 is electrically connected to thefirst electrode plate 111, and the other end thereof protrudes to an upper portion of theelectrode assembly 110 to then be electrically connected to thecap assembly 130. - Meanwhile, a plurality of
first tabs 111a extending to be integrated with thefirst electrode plate 111 or coupled to thefirst electrode plate 111 and extending are formed at one side of thefirst electrode plate 111. Thefirst tabs 111a extend from thefirst electrode plate 111 and protrude therefrom, and thus thefirst electrode plate 111 may operate as a first electrode. In addition, thefirst tabs 111a may be formed through a portion of an uncoated region of thefirst electrode plate 111, which is not coated with an active material. That is to say, thefirst tabs 111a are previously formed on various locations of thefirst electrode plate 111 by pressing, and thefirst electrode plate 111 is then wound together with the second electrode plate 112 and theseparator 113, thereby forming thefirst tabs 111a to be parallel with one another at given locations. In addition, since thefirst tabs 111a are integrally formed with thefirst electrode plate 111, improved electrical performance can be demonstrated, compared to a case where separate lead tabs are attached to thefirst electrode plate 111. - The second electrode plate 112 is formed by coating a second electrode active material on a second electrode current collector made of a metal foil, such as a copper or nickel foil. In order to increase the capacity, the second electrode plate 112 may use a silicon (Si) based material as the second electrode active material. In this case, since the silicon used as the active material of the second electrode plate 112 is highly expandable, an increased amount of the silicon may advantageously increase the capacity per unit volume. However, as the amount of the silicon is increased, deformation of the second electrode plate 112 may also be increased. In particular, in a case where separate lead tabs are attached to the second electrode plate 112, the second electrode plate 112 formed in the
wound electrode assembly 110 may be distorted due to the thicknesses of the lead tabs, resulting in deformation of theelectrode assembly 110 and degrading the roundness. - In the
secondary battery 100 according to an embodiment, like thefirst electrode plate 111, the second electrode plate 112 may also includesecond tabs 112a extending from the second electrode plate 112, and thesecond tabs 112a are configured to extend from and integrally formed with the second electrode plate 112, and thus deformation may not be caused to theelectrode assembly 110. In addition, since thesecond tabs 111a are integrally formed with the second electrode plate 112, improved electrical performance can be demonstrated, compared to a case where separate lead tabs are attached to the second electrode plate 112. - However, in the
secondary battery 100 according to an embodiment, either of thefirst tabs 111a and thesecond tabs 112a may be replaced with a single lead tab. - The
separator 113 is disposed between thefirst electrode plate 111 and the second electrode plate 112 to prevent a short circuit therebetween while allowing lithium ions to move. Theseparator 113 may be made of polyethylene, polypropylene or a composite film of polyethylene and polypropylene. - In addition, as will later be described, in a state in which one end of the first
current collection tab 121 is coupled to thefirst tabs 111a, the other end opposite to the one end of the firstcurrent collection tab 121 may be adjustably cut into a desired length and the firstcurrent collection tab 121 may then be coupled to the sub-plate 162. - Meanwhile, the second
current collection tab 122 is coupled to thesecond tabs 112a at front and rear ends thereof by ultrasonic welding. Accordingly, thesecond tabs 112a are put together and then fixed at one end of the secondcurrent collection tab 122. In addition, the other end of the secondcurrent collection tab 122 may be coupled to the bottom surface of thecase 140. Therefore, the secondcurrent collection tab 122 may electrically connect the second electrode plate 112 and thesecond tabs 112a to thecase 140. Here, since thecase 140 is electrically disconnected from the cap-up 150 by thegasket 190, an electrical short circuit does not occur. Like the firstcurrent collection tab 121, in a state in which one end of the secondcurrent collection tab 122 is coupled to thesecond tabs 112a, the other end opposite to the one end of the secondcurrent collection tab 122 may be adjustably cut into a desired length and the secondcurrent collection tab 122 may then be coupled to thecase 140. - The
current collection tab 120 may include a pair ofcurrent collection tabs 120, which are coupled to thefirst tabs 111a and thesecond tabs 112a of theelectrode assembly 110, respectively. The pair ofcurrent collection tabs 120 may be coupled to the plurality offirst tabs 111a and the plurality ofsecond tabs 112a at front and rear ends thereof, respectively, to then be fixed by ultrasonic welding. Thecurrent collection tab 120 may include the firstcurrent collection tab 121 coupled to thefirst tabs 111a and the secondcurrent collection tab 122 coupled to thesecond tabs 112a. - The first
current collection tab 121 electrically connect thefirst tabs 111a and thesafety vent 160. The firstcurrent collection tab 121 is coupled to thefirst tabs 111a at front and rear ends thereof by ultrasonic welding, and thus can put together the plurality offirst tabs 111a to then be fixed. - In addition, the first
current collection tab 121 may be coupled to the sub-plate 162 bent from the location of thefirst tabs 111a to be coupled to a lower portion of thesafety vent 160. Therefore, thefirst electrode plate 111 may be electrically connected to thesafety vent 160 by means of thefirst tabs 111a, the firstcurrent collection tab 121 and the sub-plate 162, and thus may be finally connected to the cap-up 150. However, when thesafety vent 160 is upwardly inverted due to the internal pressure of thecase 140, the sub-plate 162 is separated from thesafety vent 160, so that thesafety vent 160 and the cap-up 150 are electrically disconnected from thefirst electrode plate 111, thereby promoting safety. - Meanwhile, as a result of ultrasonic welding employed in fixing the first
current collection tab 121 and the secondcurrent collection tab 122, a plurality of protrusions may be formed on surfaces of the firstcurrent collection tab 121 and the secondcurrent collection tab 122. Therefore, during resistance welding employed in coupling the firstcurrent collection tab 121 to the sub-plate 162 and in coupling the secondcurrent collection tab 122 to the bottom surface of thecase 140, the resistance may be increased by the protrusions, thereby allowing the resistance welding to be performed in a more easy and secured manner. Therefore, the states in which the firstcurrent collection tab 121 and the secondcurrent collection tab 122 are coupled to the sub-plate 162 and thecase 140 can be more securely maintained. - However, when either of the
first tabs 111a and thesecond tabs 112a has a lead tab structure, a current collection tab corresponding thereto may not be separately provided. In this case, the lead tab may be directly coupled to thesafety vent 160 or the bottom surface of thecase 140. - The
insulation plate 130 is formed at upper and lower portions of theelectrode assembly 110. Theinsulation plate 130 may be formed as a substantially circular plate. Theinsulation plate 130 may be made of an electrically insulating material, which typically includes polypropylene (PP) or polyethylene (PE), but embodiments of the present disclosure are not limited thereto. - The
insulation plate 130 may include afirst insulation plate 131 positioned between theelectrode assembly 110 and the cap-down 180, and asecond insulation plate 132 positioned between theelectrode assembly 110 and the bottom surface of thecase 140. - The
first insulation plate 131 may be formed to cover an upper region of theelectrode assembly 110 and may include ahole 131a provided to correspond to a region from which thefirst tabs 112a protrude. Accordingly, thefirst tabs 112a may further protrude to an upper portion of thefirst insulation plate 131 to then be coupled to the firstcurrent collection tab 121. - In addition, the
second insulation plate 132 may be shaped to correspond to thefirst insulation plate 131. Therefore, thesecond insulation plate 132 may be formed to cover a lower region of theelectrode assembly 110 and may include a hole (not shown) through which thesecond tabs 112a protrude to a lower portion of thesecond insulation plate 132. Accordingly, thesecond tabs 112a may be coupled to the secondcurrent collection tab 122. - The
case 140 includes a side surface plate 141 shaped of a cylindrical body having a predetermined diameter to provide a space in which theelectrode assembly 110 is received, and a bottom surface plate 142 for sealing a bottom portion of the side surface plate 141. A top opening of thecase 140 is opened so as to be sealed after theelectrode assembly 110 is inserted into thecase 140. In addition, a beading part 143 for preventing movement of theelectrode assembly 110 is provided at an upper portion of thecase 140. In addition, a crimping part 144 for fixing thecap assembly 130 and thegasket 190 is provided at the topmost end of thecase 140. - The cap-
up 150, thesafety vent 160, theinsulator 170 and the cap-down 180 may constitute thecap assembly 130. In addition, thecap assembly 130 may further include the sub-plate 162 fixed on a bottom surface of thesafety vent 160 downwardly protruding through a through-hole of the cap-down 180 and electrically connected to the firstcurrent collection tab 121. - The cap-up 150 having an upper portion upwardly protruding may be electrically connected to an external circuit. The cap-
up 150 includes gas discharge holes 151 formed to provide pathways through which gases generated in thecase 140 are discharged. The cap-up 150 is electrically connected to theelectrode assembly 110 and transfers the current generated in theelectrode assembly 110 to the external circuit. - The
safety vent 160 is formed to have a circular plate so as to be shaped to correspond to the cap-up 150 and includes a downwardly protrudingprotrusion part 161 provided at its center. Thesafety vent 160 is electrically connected to the sub-plate 162 positioned on the bottom surface of the cap-down 180 using theprotrusion part 161 penetrating the through-hole 181 of the cap-down 180. Here, theprotrusion part 161 of thesafety vent 160 and the sub-plate 162 may be welded to each other by laser welding, ultrasonic welding, resistance welding, or the like. - The
safety vent 160 is installed to make close contact with other parts of the cap-up 150, except for the upwardly protruding part, and discharges internal gases while interrupting the current when an internal pressure is abnormally generated within thecase 140. If the internal pressure thecase 140 exceeds an operating pressure of thesafety vent 160, theprotrusion part 161 of thesafety vent 160 rises to then be electrically disconnected from the sub-plate 162. - Here, a portion of the sub-plate 162, which is welded to the
protrusion part 161, is ruptured, and the sub-plate 162 is electrically disconnected from thesafety vent 160. In addition, when the internal pressure of thecase 140 exceeds a rupture pressure higher than the operating pressure of thesafety vent 160, thesafety vent 160 is ruptured. Accordingly, the internal gas may be discharged through the gas discharge holes 151 of the cap-up 150. - To this end, the sub-plate 162 is positioned under the cap-
down 180. The sub-plate 162 is welded between theprotrusion part 161 of thesafety vent 160, which penetrates the through-hole 181 of the cap-down 180, and the firstcurrent collection tab 121. Accordingly, the sub-plate 162 electrically connects the firstcurrent collection tab 121 and theprotrusion part 161 to each other. Meanwhile, if the internal pressure of thecase 140 increases, theprotrusion part 161 of thesafety vent 160 may rise, and the sub-plate 162 may be electrically disconnected from theprotrusion part 161. Therefore, thesafety vent 160 may also be electrically disconnected from the firstcurrent collection tab 121. - The
insulator 170 is disposed between thesafety vent 160 and the cap-down 180 to insulate thesafety vent 160 and the cap-down 180 from each other. Theinsulator 170 may be made of a resin material such as polyethylene (PE), polypropylene (PP), or polyethylene terephthalate (PET). - The cap-down 180 is shaped of a circular plate. The cap-down 180 includes the through-hole 181 of the cap-down 180 formed at its center, and the
protrusion part 161 of thesafety vent 160 may penetrate the through-hole 181. In addition, theinsulator 170 is formed on the top surface of the cap-down 180 to electrically disconnect thesafety vent 160 and the cap-down 180 from each other. - The
gasket 190 is installed at the top opening of thecase 140. That is to say, thegasket 190 is assembled to make close contact with outer peripheral edges of the cap-up 150 and thesafety vent 160 and the top opening of thecase 140. Thegasket 190 may prevent thecap assembly 130 from being separated from thecase 140. - As described above, the
secondary battery 100 according to an embodiment includes the plurality offirst tabs 111a and the plurality ofsecond tabs 112a extending from the respective uncoated portions of thefirst electrode plate 111 and the second electrode plate 112, which constitute theelectrode assembly 110, to be integrally formed with thefirst electrode plate 111 and the second electrode plate 112, thereby increasing electrical efficiency by reducing electrical resistance, and preventing deformation of the electrode assembly from occurring in a case where separate lead tabs are coupled to the first andsecond electrode plates 111 and 112, and ultimately preventing lowering of roundness. - In addition, the
secondary battery 100 according to an embodiment includes thecurrent collection tab 120, which consists of the firstcurrent collection tab 121 and the secondcurrent collection tab 122 coupled to thefirst tabs 111a and thesecond tabs 112a at front and rear ends thereof, by which separate lead tabs are replaced, thereby allowing conventional methods for manufacturing cylindrical batteries to be still utilized, thereby increasing the manufacturing efficiency. - In addition, when the first
current collection tab 121 and the secondcurrent collection tab 122 are coupled to thefirst tabs 111a and thesecond tabs 112a, respectively, ultrasonic welding is employed, so that a plurality of protrusions are formed on surfaces of the firstcurrent collection tab 121 and the secondcurrent collection tab 122 to increase resistance, thereby allowing the firstcurrent collection tab 121 and the secondcurrent collection tab 122 to be stably coupled to the sub-plate 162 and the case 14-, respectively, by resistance welding. - Hereinafter, a manufacturing method of a secondary battery according to an embodiment will be described in greater detail.
-
FIG. 3 is a perspective view illustrating an electrode assembly in the secondary battery according to an embodiment.FIG. 4 is a side view illustrating the electrode assembly in the secondary battery according to an embodiment.FIG. 5 is a plan view illustrating the electrode assembly in the secondary battery according to an embodiment.FIG. 6 is a side view illustrating a state in which a current collection tab is coupled to the electrode assembly in the secondary battery according to an embodiment.FIG. 7 is a plan view illustrating an insulation plate in the secondary battery according to an embodiment.FIG. 8 is a side view illustrating the insulation plate provided at the electrode assembly in the secondary battery according to an embodiment.FIG. 9 is a cross-sectional view illustrating a state in which the electrode assembly is inserted into a case in the secondary battery according to an embodiment. - First, referring to
FIGS. 3 and4 , anelectrode assembly 110 having a generally cylindrical shape and includingfirst tabs 111a extending from and integrally formed with a first electrode plate andsecond tabs 112a extending from and integrally formed with a second electrode plate, is provided. - Here, the
first tabs 111a may protrude to an upper portion of theelectrode assembly 110, and thesecond tabs 112a may protrude to a lower portion of theelectrode assembly 110. - Referring to
FIG. 5 , thefirst tabs 111a may be arranged so as to have an equal width. Therefore, when thefirst tabs 111a are compressed at front and rear ends to overlap each other with the same area, thereby facilitating welding. - Next, referring to
FIG. 6 , a firstcurrent collection tab 121 and a secondcurrent collection tab 122 are coupled to thefirst tabs 111a and thesecond tabs 112a, respectively. Here, the firstcurrent collection tab 121 and the secondcurrent collection tab 122 may be formed in a substantially U shape or a clip shape, and may be spaced apart from each other in view of connectingparts first tabs 111a and thesecond tabs 112a to then be coupled to each other by ultrasonic welding. In addition, after the firstcurrent collection tab 121 and the secondcurrent collection tab 122 are welded to each other, the connectingparts current collection tab 121 and the secondcurrent collection tab 122 may be adjustably cut into a desired length as much as lengths of the connectingparts current collection tab 121 and the secondcurrent collection tab 122 may be maintained at a coupled state because they are welded to thefirst tabs 111a and thesecond tabs 112a. - Referring to
FIGS. 7 and8 , afirst insulation plate 131 and asecond insulation plate 132 may be coupled to top and bottom portions of theelectrode assembly 110, respectively. Therespective insulation plates holes 131a and 132a to allow thefirst tabs 111a and thesecond tabs 112a of theelectrode assembly 110 to protrude therethrough, thereby maintaining thetabs current collection tabs - In addition, referring to
FIG. 9 , theelectrode assembly 110, thecurrent collection tab 120 and theinsulation plate 130 may be housed together within thecase 140. In addition, as described above, the secondcurrent collection tab 122 may be coupled to the bottom surface of thecase 140 by resistance welding. Meanwhile, although not separately shown, a cap assembly may later be coupled to the top portion of thecase 140, and the firstcurrent collection tab 121 may be coupled to a sub-plate 162 of the cap assembly by resistance welding. Thereafter, sidewalls of thecase 140 may be clamped with the cap assembly, thereby completing a final structure. - Hereinafter, a configuration of a secondary battery according to another embodiment will be described.
-
FIG. 10 is a perspective view illustrating an electrode assembly in a secondary battery according to another embodiment.FIG. 11 is a plan view illustrating the electrode assembly in the secondary battery according to another embodiment. - Referring together to
FIGS. 10 and11 , the secondary battery according to another embodiment may include anelectrode assembly 210. Here, although not shown, other elements, except for theelectrode assembly 210, may be configured in the same manner as in the previous embodiment, and the following description will focus on the configuration of theelectrode assembly 210. - The
electrode assembly 210 may includefirst tabs 211a andsecond tabs 212a protruding to top and bottom portions thereof, respectively. Here, thefirst tabs 211a and thesecond tabs 212a may be configured to extending from uncoated portions of a first electrode plate and a second electrode plate to be integrally formed therewith, respectively. In addition, thefirst tabs 211a and thesecond tabs 212a may be configured to have larger areas as they are positioned further from the center of theelectrode assembly 110. That is to say, each of thefirst tabs 211a and thesecond tabs 212a may be provided in the shape of an arc having a corresponding angle on the basis of the center of theelectrode assembly 110. With this configuration, thefirst tabs 211a and thesecond tabs 212a may make contact with the first current collection tab and the second current collection tab over an increased area to then be coupled to each other, thereby reducing resistance and ultimately increasing electrical efficiency. - Although the foregoing embodiments have been described to practice the secondary battery of the present disclosure and the manufacturing method thereof, these embodiments are set forth for illustrative purposes and do not serve to limit the present disclosure. Those skilled in the art will readily appreciate that many modifications and variations can be made, without departing from the spirit and scope of the disclosure as defined in the appended claims, and such modifications and variations are encompassed within the scope and spirit of the present disclosure.
- The present disclosure relates to a secondary battery which has a reinforced strength and can achieve high power efficiency.
Claims (11)
- A secondary battery which comprises:an electrode assembly including a first electrode plate and a second electrode plate, wherein one of the first electrode plate and the second electrode plate includes a plurality of first tabs formed to protrude in one direction;a first current collection tab coupled to the first tabs;a case housing the electrode assembly; anda cap assembly coupled to the upper part of the case,wherein the first current collection tab is coupled to one of the cap assembly and the bottom surface of the case.
- The secondary battery of claim 1, wherein the cap assembly comprises a safety vent having the first current collection tab connected thereto.
- The secondary battery of claim 2, wherein the first current collection tab is electrically connected to a sub-plate coupled to a protrusion part of the safety vent.
- The secondary battery of claim 1, wherein the electrode assembly further includes a plurality of second tabs formed to extend from the other of the first electrode plate and the second electrode plate and to protrude in the other direction different from the one direction, and a second current collection tab coupled to the second tabs, wherein the second current collection tab is coupled to the other of the cap assembly and the bottom surface of the case, to which the first current collection tab is not coupled.
- The secondary battery of claim 1, wherein the electrode assembly further includes a second tab formed to extend from the other of the first electrode plate and the second electrode plate and to protrude in the other direction different from the one direction, wherein the second tab is coupled to the other of the cap assembly and the bottom surface of the case, to which the first current collection tab is not coupled.
- The secondary battery of claim 1, wherein the first current collecting tab is positioned at front and rear end of the first tabs and coupled to the first tabs by ultrasonic welding.
- The secondary battery of claim 1, wherein the first current collection tab is coupled to the cap assembly or the case by resistance welding.
- The secondary battery of claim 1, wherein the second electrode plate is formed of a silicon (Si) based material.
- The secondary battery of claim 1, wherein the first tabs are arranged in the electrode assembly so as to overlap one another with the same area.
- The secondary battery of claim 1, wherein the first tabs are configured to have larger areas when positioned further outward in view of the winding center of the electrode assembly.
- The secondary battery of claim 1, wherein the first current collection tab is coupled to the first tabs at front and rear ends of the first tabs and is formed by cutting regions of the first tabs positioned outward in view of end portions of the first tabs.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020180002868A KR102659830B1 (en) | 2018-01-09 | 2018-01-09 | Secondary battery And Fabricating Method Thereof |
PCT/KR2018/011841 WO2019139220A1 (en) | 2018-01-09 | 2018-10-08 | Secondary battery and manufacturing method therefor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3739669A1 true EP3739669A1 (en) | 2020-11-18 |
EP3739669A4 EP3739669A4 (en) | 2021-11-24 |
Family
ID=67219097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18899745.6A Pending EP3739669A4 (en) | 2018-01-09 | 2018-10-08 | Secondary battery and manufacturing method therefor |
Country Status (5)
Country | Link |
---|---|
US (1) | US20200343520A1 (en) |
EP (1) | EP3739669A4 (en) |
KR (1) | KR102659830B1 (en) |
CN (1) | CN111788715B (en) |
WO (1) | WO2019139220A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4047738A4 (en) * | 2019-12-17 | 2023-07-12 | LG Energy Solution, Ltd. | Cylindrical battery and method for manufacturing cylindrical battery |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210217999A1 (en) * | 2020-01-10 | 2021-07-15 | Techtronic Cordless Gp | Batteries providing high power and high energy density |
KR20210103340A (en) | 2020-02-13 | 2021-08-23 | 삼성에스디아이 주식회사 | Secondary battery improved collecting structure |
KR20220112034A (en) * | 2021-02-03 | 2022-08-10 | 삼성에스디아이 주식회사 | Secondary Battery |
CN115133228B (en) * | 2022-05-28 | 2023-03-10 | 楚能新能源股份有限公司 | Lithium ion battery current collection structure |
KR20240112041A (en) * | 2023-01-11 | 2024-07-18 | 삼성에스디아이 주식회사 | Cylindrical Secondary Battery |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3511476B2 (en) * | 1998-03-18 | 2004-03-29 | 日本碍子株式会社 | Lithium secondary battery |
US6379840B2 (en) * | 1998-03-18 | 2002-04-30 | Ngk Insulators, Ltd. | Lithium secondary battery |
JP3497786B2 (en) * | 1999-09-29 | 2004-02-16 | Necトーキン株式会社 | Rechargeable battery |
EP1610401B9 (en) * | 2000-03-14 | 2009-08-26 | SANYO ELECTRIC Co., Ltd. | Nonaqueous electrolyte secondary cells |
US8084158B2 (en) | 2005-09-02 | 2011-12-27 | A123 Systems, Inc. | Battery tab location design and method of construction |
US8951672B2 (en) * | 2007-01-30 | 2015-02-10 | Sony Corporation | Anode, method of manufacturing it, battery, and method of manufacturing it |
US9537121B2 (en) * | 2011-03-18 | 2017-01-03 | Samsung Sdi Co., Ltd. | Secondary battery and secondary battery pack having a flexible collecting tab extending through a cap plate |
KR102007702B1 (en) * | 2013-01-03 | 2019-10-21 | 삼성에스디아이 주식회사 | Rechargeable battery |
JP6274034B2 (en) * | 2014-06-30 | 2018-02-07 | 株式会社豊田自動織機 | Power storage device |
KR20160059748A (en) * | 2014-11-19 | 2016-05-27 | 삼성에스디아이 주식회사 | Electrode assembly and battery pack having same |
JP6665789B2 (en) * | 2014-12-11 | 2020-03-13 | 株式会社Gsユアサ | Storage element |
JP6593344B2 (en) * | 2014-12-16 | 2019-10-23 | 三洋電機株式会社 | Cylindrical battery |
KR101781826B1 (en) * | 2015-02-17 | 2017-09-26 | 주식회사 엘지화학 | Cylindrical Secondary Battery Having Two More Cathode and Anode Tabs |
KR102141240B1 (en) * | 2015-04-30 | 2020-08-04 | 주식회사 엘지화학 | Electrode assembly and secondary battery comprising the same |
JP2016225117A (en) * | 2015-05-29 | 2016-12-28 | 株式会社東芝 | Secondary battery |
KR102555496B1 (en) * | 2015-11-12 | 2023-07-12 | 삼성에스디아이 주식회사 | Positive active materials for rechargeable lithium battery, positive electrode including the same and rechargeable lithium battery |
KR102668193B1 (en) * | 2016-01-04 | 2024-05-23 | 삼성에스디아이 주식회사 | Cap assembly and secondary battery including the same |
KR20180000223A (en) * | 2016-06-22 | 2018-01-02 | 삼성에스디아이 주식회사 | Rechargeable battery |
-
2018
- 2018-01-09 KR KR1020180002868A patent/KR102659830B1/en active IP Right Grant
- 2018-10-08 US US16/960,293 patent/US20200343520A1/en active Pending
- 2018-10-08 CN CN201880089886.8A patent/CN111788715B/en active Active
- 2018-10-08 EP EP18899745.6A patent/EP3739669A4/en active Pending
- 2018-10-08 WO PCT/KR2018/011841 patent/WO2019139220A1/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4047738A4 (en) * | 2019-12-17 | 2023-07-12 | LG Energy Solution, Ltd. | Cylindrical battery and method for manufacturing cylindrical battery |
Also Published As
Publication number | Publication date |
---|---|
EP3739669A4 (en) | 2021-11-24 |
CN111788715A (en) | 2020-10-16 |
WO2019139220A1 (en) | 2019-07-18 |
US20200343520A1 (en) | 2020-10-29 |
CN111788715B (en) | 2023-04-28 |
KR102659830B1 (en) | 2024-04-23 |
KR20190084751A (en) | 2019-07-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3739669A1 (en) | Secondary battery and manufacturing method therefor | |
EP2128913B1 (en) | Cap assembly and secondary battery having the same | |
JP5275298B2 (en) | Secondary battery | |
KR101514827B1 (en) | Secondary battery and method for manufacturing the same | |
KR101627626B1 (en) | Rechargeable battery | |
CN106941136B (en) | Cap assembly and secondary battery including the same | |
US20040126650A1 (en) | Electrode assembly for lithium ion cell and lithium cell using the same | |
EP2325924B1 (en) | Secondary battery comprising a short circuit inducing member | |
US8679673B2 (en) | Cap assembly, can, and secondary battery employing the same | |
CN107667443B (en) | Cap assembly for secondary battery | |
EP2197064A1 (en) | A vent member for a secondary battery | |
US7927734B2 (en) | Lithium secondary battery and fabrication method thereof | |
JP2009087915A (en) | Secondary battery | |
CN109690811B (en) | Secondary battery | |
WO2019194053A1 (en) | Cell module | |
JP5203729B2 (en) | Secondary battery and battery module | |
US20210296746A1 (en) | Secondary battery | |
KR20130074236A (en) | Cap assembly of improved productivity and cylindrical battery cell employed with the same | |
KR101523064B1 (en) | Cap assembly and secondary battery including the same | |
KR102522701B1 (en) | The Secondary Battery | |
KR101446153B1 (en) | Cap assembly for secondary battery, secondary battery using the same, and method for manufacturing the secondary battery | |
US20230299397A1 (en) | Secondary battery and method for manufacturing the same | |
KR101121205B1 (en) | Secondary battery | |
KR101453782B1 (en) | Secondary battery and method for manufacturing the same | |
KR20130019976A (en) | Method for manufacturing secondary battery |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20200708 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20211022 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: H01M 4/02 20060101ALN20211018BHEP Ipc: H01M 4/134 20100101ALI20211018BHEP Ipc: H01M 4/38 20060101ALI20211018BHEP Ipc: H01M 10/0525 20100101ALI20211018BHEP Ipc: H01M 10/0587 20100101ALI20211018BHEP Ipc: H01M 50/152 20210101ALI20211018BHEP Ipc: H01M 50/167 20210101ALI20211018BHEP Ipc: H01M 50/184 20210101ALI20211018BHEP Ipc: H01M 50/342 20210101ALI20211018BHEP Ipc: H01M 50/528 20210101ALI20211018BHEP Ipc: H01M 50/533 20210101ALI20211018BHEP Ipc: H01M 50/536 20210101ALI20211018BHEP Ipc: H01M 50/538 20210101ALI20211018BHEP Ipc: H01M 50/578 20210101ALI20211018BHEP Ipc: H01M 10/04 20060101ALI20211018BHEP Ipc: H01M 50/107 20210101AFI20211018BHEP |